I have been having a number of issues with the bluetooth radio on my NUC7i5. Intermittently the bluetooth stop functioning and restarting does not do anything to fix it. The system device manager tells me that a USB device is not recognized, which I guess is the bluetooth.

If I unplug the machine for a few minutes, then switch on again, this seems to fix the issue. My logitech mx anywhere 2S mouse and k810 keyboard are both attached via bluetooth so its a real pain when they no longer function.

Separately, on booting, sometimes the machine gets stuck on the grey NUC pre-bios screen, sometimes it doesn't get to that screen. If I power off and power on again, it generally boots correctly.

To get the Power Button menu, press the Power Button for 3 seconds (but not more than 4 seconds). Release the Power Button once the Power Led changes its color from blue to amber. NUC will boot into Power Button menu.

3. While the USB stick with the BN0050.bio file is inserted into USB socket, press F4 to initiate the bios recovery process.

Could be that you have some corruption within Windows 10. It is very easy to repair possible corrupted Windows 10 without loosing any think with an in place upgrade. Here you can see the tutorial how to do this: Windows 10 Forums . Go to step 6 of this tutorial to create media using Media Creation Tool.